Mario Clemente Mastella (born 5 February 1947) is an Italian politician. He is currently leader of Popular-UDEUR, a minor centrist Italian party. He was Minister of Labour in the Berlusconi government from 10 May 1994 to 17 January 1995, and Minister of Justice in the Prodi government from 17 May 2006 to 17 January 2008. In addition Mastella is also mayor of his native town, Ceppaloni.
Mastella was born in Ceppaloni, province of Benevento.
A former long-time member of the Christian Democracy party and Member of Parliament since 1976, after the break-up of his party in 1994 Mastella founded a new party, called Centro Cristiano Democratico, together with Pierferdinando Casini. After the victory of Silvio Berlusconi in the 1994 elections, he was successively appointed as Minister of Labour.